Grades and snap counts for every rookie who played in Week 2 of the 2021 NFL preseason, from New England Patriots' Mac Jones to Dallas Cowboys' Micah Parsons.

From staying late running deep routes for QB Justin Herbert to picking the brains of Keenan Allen and Mike Williams, Los Angeles Chargers rookie wide receiver Josh Palmer is doing everything he can to contribute early in the 2021 NFL season.

The San Francisco 49ers defeated the Los Angeles Chargers 15-10 in a game where the main focus was on the QB1 battle between Jimmy Garoppolo and Trey Lance.

Neither the Cleveland Browns nor the New York Giants played many regular starters in what turned into a thrilling 17-13 Browns win in Week 2 of the 2021 NFL preseason.

Neither team played many of its starters, but the Raiders won a surprisingly exciting 17-16 game that became a last-second nail-biter.

The Baltimore Ravens stifled the Carolina Panthers with stout defense and a bruising run game in Week 2 of the 2021 NFL preseason.

The Indianapolis Colts rode their kicking game to victory Saturday night, defeating the Minnesota Vikings 12-10 behind four field goals.

On the back of three interceptions from Dallas Cowboys backup quarterback Ben Dinucci, the Houston Texans escaped Saturday with a 20-14 victory.

Ben Roethlisberger found rookie tight end Pat Freiermuth for two touchdowns in the Pittsburgh Steelers preseason Week 2 win over the Detroit Lions.

In a game where both teams rested most of its starters, the Tennessee Titans came away with a dominant 34-3 victory over the Tampa Bay Buccaneers.

Second-year Dolphins quarterback Tua Tagovailoa looked comfortable in his preseason Week 2 action against the Atlanta Falcons, and Myles Gaskin was the clear lead back for Miami.

In a game where most of the Seattle Seahawks' starters were resting, the Denver Broncos easily bested them 30-3.

Rookie quarterback Zach Wilson shined in limited action against the Green Bay Packers, further building up the hype around him ahead of the 2021 NFL season.

Mitchell Trubisky got some revenge against his former team on Saturday, leading the Buffalo Bills to four consecutive touchdown drives to open up the game en route to a 41-15 win over the Chicago Bears that was never in question.

Both starting offenses looked sluggish but the Kansas City Chiefs were able to escape with a 17-10 victory over the Arizona Cardinals in Week 2 of the preseason.

Joe Burrow didn't return to the field for the Cincinnati Bengals, and both groups of starters were underwhelming in the Washington Football Team's 17-13 victory.

First-round quarterback Mac Jones hasn't skipped a beat through two preseason games, and while the NFL regular season is a different beast, he looks ready to start for the New England Patriots.

While overreactions fly left and right as rookies make their NFL preseason debuts, their performance is usually non-predictive for regular-season success.